Humidifier for hot-air heating systems



Se t. 6 192 p 7 c. J. HILTY HUMIDIFIER FOR HOT AIR HEATING SYSTEMS FiledFb. 25. 1926 I 314 00144306 ChrisZianrI Hilizy Patented Sept. 6, 1927.

UNITED STATES CHRISTIAN J. HILTY, OF ItITTlVIAN, OHIO.

HUMIDIFIER FOR HOT-AIR HEATING SYSTEMS.

Application filed February 25, 1926. Serial No. 90,572.

This invention relates to humidifiers for hot air heating systems andmore part cularly to a device of this character which is selfregulating.j

More specifically, the ob ect of the invention is to provide meanswithin the fire tank for generating steam and means for conducting thesteam to the air heating space of the furnace so that it may mingle withthe air which passes from the furnace to the rooms of the house.

A furtherobject of the invention is to produce a device of thischaracter which may be readily and cheaply produced, which wlll bedurable and efficient in service and a general improvement in the art.

These and other objects I attain by the construction shown in theaccompanying drawings, wherein for the purpose of illustration is showna preferred embodiment of my invention and wherein Figure 1 is afragmentary side elevation of a hot air furnace having a humidifyingapparatus constructed in accordance with my 26 invention;

' Figure 2 is a section on the line 22 of Figure 1;

Figure 3 is a section on the line 33 of Figure 2;

Figure 4 is a section on the hne of Figure 1. Referring now moreparticularly to the drawings, the numeral 10 generally indicates thefire-pot of a furnace and 11 the air heating chamber formed between theouter casing 12 of the furnace and the fire-pot wall 13 thereof. Thenumeral 14 generally designates a horizontally disposed casing adaptedto be disposed within the firepot 4.0 above the normal level of'the firetherein, this casing having communicating therewith adjacent the bottomthereof an inlet 15 and adjacent the top thereof an outlet 16 which arein the form of conduits let through the wall of the furnace in anysuitable manner. The conduit forming the outlet 16 is continued Withinthe casing 14 adjacent the top thereof and is provided in that portionthereof which projects into the casing with a plurality of openings 17.This outlet communicates at its outer end with a conduit 18, theextremity of which is projected into the air heating chamber and isthere provided with a plurality of openings 19.

Communicating with'the conduit 15 is a float tank 20, the float valve 21of which represented by the exhaust pipe 16 andthe perforated pipe 18,is provided with a drain 23, discharging into the float tank so that anycondensation water caused by cooling of the steam passing from thecasing 14 to the openings 19 may drain back into this float tank. Thefloat tank may be supplied from any suitable source, such as the citymain, generally designated at 24. 4

In the operation ofthe device, the water admitted to the casing 14 isconverted intolj steam by the heat of the fire and in this form passesthrough the conduits 16 and 18 to the openings 19 where it mingles withthe air passing through the heating chamber 11 of the furnace to betransmitted with this air to the rooms. As water is converted intosteam, it is replaced by fresh water from the float tank 20 and in eventthe float valve of the float tank sticks, water is prevented from risingin the casing 14 to an extent where it will pass through the openings 17and thus through the conduits 16 and 18 to the openings 19 by theoverflow pipe 22. Since all condensation water is returned to the floattank, it follows thatno water can enter the hot air chamber 11 except inthe form of steam and accordingly the walls of this hot air chamber willnot be dampened to an extent where corrosion and obstruction thereofwill result. 3

Since the construction hereinbefore set forth is capable of a certainrange of change and modification without materially departing from thespirit of the invention, I do not limit myself to such specificstructure except as hereinafter claimed.

I claim 1. In a humidifier for hot air furnaces, a casing adapted forinsertion in the fire box of a furnace, intake and'exhaust pipescommunicating with the casing, means connected with the intake tomaintain a constant level within the casing below the level of theexhaust pipe, a perforated pipe arranged within the hot air chamber ofthe furnace, a connection between the exhaust pipe and said perforatedpipe said means for constantly maintaining a fluidle'vel within thecasing including a float tank-and a drain connecting the connectionbetween the exhaust and perforated pipe and said float tank.

2. In a humidifier for hot air furnaces, a casing adapted for insertion1n the fire box of a furnace, intake and exhaust pipes communicatingwith the casing, means connected with the intake to maintain a constantlevel within the casing below the level of the exhaust pipe, aperforated pipe arranged within the hot-air chamber of the furnace, aconnection between the exhaust pipe and said perforated pipe, said meansfor constantly maintaining a fluid level within the casing including afloat tank and a drain connecting the connection between the exhaust andperforated pipe and said float tank, said float tank having an overflowarranged between the normal level of water therein and the level towhich water must rise to pass into the exhaustpipe of said casing.

In testimony whereof I hereunto aflix my signature.

CHRISTIAN J. HILTY.

